Related Experiment Video
Updated: Jun 23, 2025
09:23
JenaTron - An Experimental Approach to Study the Effects of Plant History and Soil History on Grassland Ecosystem Functioning
Published on: March 21, 2025
864
The macro-eco-evolutionary interplay between dispersal, competition and landscape structure in generating
Summary
Intermediate dispersal levels can maximize biodiversity, but competition shifts this peak. Macro-evolutionary processes and landscape structure further shape these complex relationships over time.
Area of Science:
- Ecology
- Evolutionary Biology
- Biodiversity Science
Background:
- Dispersal is theorized to influence species diversity, with intermediate dispersal rates often predicted to yield the highest diversity.
- The impact of macro-eco-evolutionary mechanisms, such as competition and landscape structure, on the dispersal-diversity relationship remains incompletely understood.
Purpose of the Study:
- To investigate the combined effects of dispersal, competition, and landscape structure on biodiversity dynamics over macro-evolutionary timescales.
- To model how these factors interact to shape speciation and trait evolution in a dynamic archipelago.
Main Methods:
- Utilized a simulation model incorporating allopatric speciation, temperature niche evolution, dispersal, competition, and trait-based trade-offs.
- Simulated biodiversity patterns over 5 million years in a dynamic archipelago landscape with varying connectivity regimes.
Main Results:
- Biodiversity (alpha, gamma, and phylogenetic) peaked at intermediate dispersal rates across different connectivity regimes.
- Competition shifted diversity peaks towards higher dispersal values by promoting the evolution of thermal specialists and limiting geographical ranges.
- Multiple dispersal-diversity relationships emerged, consistently shaped by dispersal strength and competition intensity, even with evolving traits and trade-offs.
Conclusions:
- Dispersal, competition, and landscape structure are critical interacting factors shaping macro-biodiversity patterns.
- Competition can modify the classic intermediate dispersal-diversity relationship, influencing speciation and range evolution.
- The interplay of these factors leaves lasting biodiversity signatures, especially when trait trade-offs are present.
Related Concept Videos
02:31Habitat Fragmentation
17.5K
Habitat fragmentation describes the division of a more extensive, continuous habitat into smaller, discontinuous areas. Human activities such as land conversion, as well as slower geological processes leading to changes in the physical environment, are the two leading causes of habitat fragmentation. The fragmentation process typically follows the same steps: perforation, dissection, fragmentation, shrinkage, and attrition.
17.5K
00:54Distribution and Dispersion
21.7K
To understand intra-specific interactions in populations, scientists measure the spatial arrangement of species individuals. This geographic arrangement is known as the species distribution or dispersion. Highly territorial species exhibit a uniform distribution pattern, in which individuals are spaced at relatively equal distances from one another. Species that are highly tied to particular resources, such as food or shelter, tend to concentrate around those resources, and thus exhibit a...
21.7K
02:02Ecological Niches
23.6K
All organisms have a position within an ecosystem. The complete set of living and nonliving factors—including food resources, climate, and terrain—that define the position of a given organism are collectively referred to as the organism’s ecological niche.
23.6K
01:50Threats to Biodiversity
22.2K
There have been five major extinction events throughout geological history, resulting in the elimination of biodiversity, followed by a rebound of species that adapted to the new conditions. In the current geological epoch, the Holocene, there is a sixth extinction event in progress. This mass extinction has been attributed to human activities and is thus provisionally called the Anthropocene. In 2019 the human population reached 7.7 billion people and is projected to comprise 10 billion by...
22.2K
01:19What is Biodiversity?
27.3K
Biodiversity describes the variety of living things at multiple organizational levels: genetic, species and ecosystem diversity. Species diversity includes all branches of the evolutionary tree from single-celled prokaryotic organisms, bacteria, and archaea, to the eukaryotic kingdoms: plants; animals; fungi; and protists. To date, there have been about 1.75 million species identified, and new species are discovered every week.
27.3K
02:26Ecological Disturbance
17.1K
An ecological disturbance is a temporary disruption in the environment resulting from abiotic, biotic, or anthropogenic factors, causing a pronounced change in an ecosystem. The impact of an ecological disturbance, which can depend on its intensity, frequency, and spatial distribution, plays a significant role in shaping the species diversity within the ecosystem.
17.1K